SCR basic voltage characteristics (1) reverse characteristic when the control electrode open, SCR anode coupled with reverse voltage BTA412Y, J2 junction is forward biased, but the J1, J2 junction reverse biased. At this point only flows through the small reverse saturation current, when the voltage is further increased to J1 junction avalanche breakdown voltage, then the difference between junctions J3 also breakdown, the rapid increase in current, start bending characteristics, such as the characteristics shown in paragraph OR The voltage of the bend URO called "reverse breakover voltage." In this case, a permanent reverse thyristor SCR will substantially V characteristics due to the avalanche voltage is increased after the breakdown voltage of the junction J2, J2 junction avalanche multiplication effect, a large amount of electrons and holes in the junction region into the N1 area electrons into the hole P2 zone. N1 electrons into the region by the P1 region and the junction J1 through N1 injection hole recombination zone, also, into the cavity by N2 and P2 region of the junction J3 region by injecting electrons into the P2 region of the composite, avalanche breakdown, N1 enters zone Electronic and holes into the P2 region of each compound can not be fully off, so that there is the accumulation of electrons in the N1 region, there is a hole accumulation in the P2 region, resulting in the potential of the P2 region rises, the potential of N1 area decreases, J2 junction SCR becomes forward biased, as long as the current increases slightly SCR BTA216, the voltage will drop rapidly, the so-called negative resistance characteristics, then J1, J2, J3 three junctions are in the forward-biased SCR BTA140, SCR will enter the forward conduction state ----state, this time, its characteristics and general characteristics of PN junction forward similar SCR BTA208, SCR, are fertile Electronics Dongguan City is provided by Wal-Electronic Technology Co., Ltd. Dongguan City is Wal-Electronic Technology Co., Ltd. (www.dgmydz.com) (www.dgmydz.com) strong, credible, FET and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the electronics are fertile and you hand into the brilliant, for a better future!